C#操作注册表的方法

using Microsoft.Win32 ;

1.读取指定名称的注册表的值

代码如下:

private string GetRegistData(string name)
{
string registData;
RegistryKey hkml = Registry.LocalMachine;
RegistryKey software = hkml.OpenSubKey("SOFTWARE",true);
RegistryKey aimdir = software.OpenSubKey("XXX",true);
registData = aimdir.GetValue(name).ToString();
return registData;
}

以上是读取的注册表中HKEY_LOCAL_MACHINE\SOFTWARE目录下的XXX目录中名称为name的注册表值；

2.向注册表中写数据

代码如下:

private void WTRegedit(string name,string tovalue)
{
RegistryKey hklm = Registry.LocalMachine;
RegistryKey software = hklm.OpenSubKey("SOFTWARE",true);
RegistryKey aimdir = software.CreateSubKey("XXX");
aimdir.SetValue(name,tovalue);
}

以上是在注册表中HKEY_LOCAL_MACHINE\SOFTWARE目录下新建XXX目录并在此目录下创建名称为name值为tovalue的注册表项；

3.删除注册表中指定的注册表项

代码如下:

private void DeleteRegist(string name)
{
string[] aimnames;
RegistryKey hkml = Registry.LocalMachine;
RegistryKey software = hkml.OpenSubKey("SOFTWARE",true);
RegistryKey aimdir = software.OpenSubKey("XXX",true);
aimnames = aimdir.GetSubKeyNames();
foreach(string aimKey in aimnames)
{
if(aimKey == name)
aimdir.DeleteSubKeyTree(name);
}
}

以上是在注册表中HKEY_LOCAL_MACHINE\SOFTWARE目录下XXX目录中删除名称为name注册表项；

4.判断指定注册表项是否存在

代码如下:

private bool IsRegeditExit(string name)
{
bool _exit = false;
string[] subkeyNames;
RegistryKey hkml = Registry.LocalMachine;
RegistryKey software = hkml.OpenSubKey("SOFTWARE",true);
RegistryKey aimdir = software.OpenSubKey("XXX",true);
subkeyNames = aimdir.GetSubKeyNames();
foreach(string keyName in subkeyNames)
{
if(keyName == name)
{
_exit = true;
return _exit;
}
}
return _exit;
}

以上是在注册表中HKEY_LOCAL_MACHINE\SOFTWARE目录下XXX目录中判断名称为name注册表项是否存在，这一方法在删除注册表时已经存在，在新建一注册表项时也应有相应判断；

代码如下:

using System.Windows.Forms;
using Microsoft.Win32;

namespace RegeditManager
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        //创建并写入
        private void button1_Click(object sender, EventArgs e)
        {
            RegistryKey key = Registry.LocalMachine;
            try
            {
                RegistryKey software = key.CreateSubKey("software\\LabManager");
                software = key.OpenSubKey("software\\LabManager", true);
                software.SetValue("Address", @"C:\Program Files\实验室管理系统\dbcom.xml");
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                key.Close();
            }
        }
        //读取
        private void button2_Click(object sender, EventArgs e)
        {
            string info = string.Empty;
            RegistryKey key=Registry.LocalMachine;
            try
            {
                key = key.OpenSubKey("software\\LabManager");
                if (IsRegeditKeyExit("software\\LabManager", "Address"))
                {
                    info = key.GetValue("Address").ToString();
                    MessageBox.Show("注册表里的信息为:" + info);
                }
                else
                {
                    MessageBox.Show("键值Address不存在;");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                key.Close();
            }
        }
        //删除
        private void button3_Click(object sender, EventArgs e)
        {
            RegistryKey key = Registry.LocalMachine;
            try
            {
                key = key.OpenSubKey("software\\LabManager",true);
                if (IsRegeditKeyExit("software\\LabManager", "Address"))
                {
                    key.DeleteValue("Address");
                    MessageBox.Show("删除成功");
                }
                else
                {
                    MessageBox.Show("键值Address不存在;");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                key.Close();
            }
        }

/// <summary>
        /// 判断键值是否存在
        /// </summary>
        /// <param name="RegistryStr">注册表项</param>
        /// <param name="KeyStr">键值</param>
        /// <returns></returns>
        private bool IsRegeditKeyExit(string RegistryStr,string KeyStr)
        {
            string[] subkeyNames;

RegistryKey hkml = Registry.LocalMachine;

RegistryKey software = hkml.OpenSubKey(RegistryStr);

subkeyNames = software.GetValueNames();

foreach (string keyName in subkeyNames)
            {
                if (keyName == KeyStr)  //判断键值的名称
                {
                    hkml.Close();

return true;
                }
            }
            hkml.Close();

return false;
        }

/// <summary>
        /// 判断注册表项是否存在
        /// </summary>
        /// <param name="RegistryName">例如:SOFTWARE</param>
        /// <param name="ValueStr">例如:LabManager</param>
        /// <returns></returns>
        private bool IsRegeditItemExist(string RegistryName,string ValueStr)
        {
            string[] subkeyNames;

RegistryKey hkml = Registry.LocalMachine;

RegistryKey software = hkml.OpenSubKey(RegistryName);

subkeyNames = software.GetSubKeyNames();

//取得该项下所有子项的名称的序列，并传递给预定的数组中

foreach (string keyName in subkeyNames)  //遍历整个数组
            {
                if (keyName == ValueStr) //判断子项的名称
                {
                    hkml.Close();
                    return true;
                }
            }
            hkml.Close();
            return false;

}
    }
}